can sea salt be expire??

[reefmedown]

if it does, how long???

my tank is small nano, but im going to buy the 200 gallon salt package..

 

[cloak]

As long as no moisture gets into the container then I would think the salt would be good for years on end.

 

[thegrun]

+1, as long as the salt has not solidified into a hard mass it will be fine.

 

[reefmedown]

So pretty much if little water go in the salt container can damage the salt?? No wonder my salt so hard to melt now.

 

[Dmorty217]

It will just make the salt a solid mass. I use the salt still when it's like this personally

 

[cloak]

I've heard that if the salt does get wet it will affect the calcium, magnesium and other trace elements as well. Just as an example, if everything checks out ok with dry salt, don't expect these numbers to be consistent with salt that has been exposed to moisture.
Like mentioned above though, as long as I'm not doing a large water change I would go ahead and use the salt regardless.